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* [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems
@ 2011-05-12 14:48 burnus at gcc dot gnu.org
2011-05-12 19:56 ` [Bug fortran/48977] " ubizjak at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: burnus at gcc dot gnu.org @ 2011-05-12 14:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48977
Summary: -fpe-trap=denormal on x86 GLIBC systems
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: burnus@gcc.gnu.org
Kind of follow up to PR 38810 - and motivated by
http://groups.google.com/group/comp.lang.fortran/browse_thread/thread/894fb77cabc6e8c7
GLIBC (and POSIX) do not support FE_DENORMAL and thus -fpe-trap=denormal does
not work. However, gfortran has a target version for denormal trapping:
fpu-387.h has:
if (options.fpe & GFC_FPE_DENORMAL) cw &= ~_FPU_MASK_DM;
[...]
if (has_sse())
[...]
if (options.fpe & GFC_FPE_DENORMAL) cw_sse &= ~(_FPU_MASK_DM << 7);
Expected: If FE_DENORMAL is not supported and target == fpu-387.h, the latter
is used.
(It could also be of interest for the IEEE modules.)
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug fortran/48977] -fpe-trap=denormal on x86 GLIBC systems 2011-05-12 14:48 [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems burnus at gcc dot gnu.org @ 2011-05-12 19:56 ` ubizjak at gmail dot com 2011-05-20 14:01 ` jb at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: ubizjak at gmail dot com @ 2011-05-12 19:56 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48977 --- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2011-05-12 19:43:56 UTC --- Why not just: Index: configure.host =================================================================== --- configure.host (revision 173705) +++ configure.host (working copy) @@ -20,12 +20,6 @@ # DEFAULTS fpu_host='fpu-generic' -# HOST-SPECIFIC OVERRIDES -case "${host_cpu}" in - i?86 | x86_64) - fpu_host='fpu-387' ;; -esac - # CONFIGURATION-SPECIFIC OVERRIDES if test "x${have_feenableexcept}" = "xyes"; then fpu_host='fpu-glibc' @@ -39,6 +33,12 @@ fpu_host='fpu-aix' fi +# HOST-SPECIFIC OVERRIDES +case "${host_cpu}" in + i?86 | x86_64) + fpu_host='fpu-387' ;; +esac + # Some targets require additional compiler options for NaN/Inf. ieee_flags= case "${host_cpu}" in ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/48977] -fpe-trap=denormal on x86 GLIBC systems 2011-05-12 14:48 [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems burnus at gcc dot gnu.org 2011-05-12 19:56 ` [Bug fortran/48977] " ubizjak at gmail dot com @ 2011-05-20 14:01 ` jb at gcc dot gnu.org 2011-05-20 15:11 ` jb at gcc dot gnu.org 2011-05-20 15:19 ` jb at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jb at gcc dot gnu.org @ 2011-05-20 14:01 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48977 Janne Blomqvist <jb at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED URL| |http://gcc.gnu.org/ml/gcc-p | |atches/2011-05/msg01447.htm | |l Last reconfirmed| |2011.05.20 13:29:10 CC| |jb at gcc dot gnu.org AssignedTo|unassigned at gcc dot |jb at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 --- Comment #2 from Janne Blomqvist <jb at gcc dot gnu.org> 2011-05-20 13:29:10 UTC --- Patch: http://gcc.gnu.org/ml/gcc-patches/2011-05/msg01447.html ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/48977] -fpe-trap=denormal on x86 GLIBC systems 2011-05-12 14:48 [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems burnus at gcc dot gnu.org 2011-05-12 19:56 ` [Bug fortran/48977] " ubizjak at gmail dot com 2011-05-20 14:01 ` jb at gcc dot gnu.org @ 2011-05-20 15:11 ` jb at gcc dot gnu.org 2011-05-20 15:19 ` jb at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jb at gcc dot gnu.org @ 2011-05-20 15:11 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48977 Janne Blomqvist <jb at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED --- Comment #4 from Janne Blomqvist <jb at gcc dot gnu.org> 2011-05-20 14:49:02 UTC --- Fixed, closing. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/48977] -fpe-trap=denormal on x86 GLIBC systems 2011-05-12 14:48 [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems burnus at gcc dot gnu.org ` (2 preceding siblings ...) 2011-05-20 15:11 ` jb at gcc dot gnu.org @ 2011-05-20 15:19 ` jb at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: jb at gcc dot gnu.org @ 2011-05-20 15:19 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48977 --- Comment #3 from Janne Blomqvist <jb at gcc dot gnu.org> 2011-05-20 14:45:53 UTC --- Author: jb Date: Fri May 20 14:45:51 2011 New Revision: 173952 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=173952 Log: PR 48977 Denormal exception on glibc targets Modified: trunk/libgfortran/ChangeLog trunk/libgfortran/configure.host ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-05-20 15:11 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-05-12 14:48 [Bug fortran/48977] New: -fpe-trap=denormal on x86 GLIBC systems burnus at gcc dot gnu.org 2011-05-12 19:56 ` [Bug fortran/48977] " ubizjak at gmail dot com 2011-05-20 14:01 ` jb at gcc dot gnu.org 2011-05-20 15:11 ` jb at gcc dot gnu.org 2011-05-20 15:19 ` jb at gcc dot gnu.org
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